XML 37 R2.htm IDEA: XBRL DOCUMENT
v3.23.1

Pay vs Performance Disclosure | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Pay vs Performance [Table Text Block] |  |
Pay Versus Performance
As previously discussed in the CD&A above, our Compensation Committee has focused on implementing executive compensation plans with the goal of tying our NEOs’ realized compensation to the achievement of Gulfport’s financial, operational, and strategic objectives, and aligning executive pay with changes in the value of our shareholders’ returns. The following table sets forth additional compensation information for our NEOs, calculated in accordance with SEC regulations, for fiscal years 2022, 2021 and 2020.
| Summary Compensation Table Total for PEO1(1) (Tim Cutt) (b) | Summary Compensation Table Total for PEO2(1) (David Wood) (b) | Compensation Actually Paid to PEO1 (Tim Cutt) (c) | Compensation Actually Paid to PEO2 (David Wood) (c) | Average Summary Compensation Table Total for non-PEO NEOs (d) | Average Compensation Actually Paid to non-PEO NEOs (e) | Value of initial fixed $100 Investment based on:(2) | Net Income ($mm) (h) | Adj. Free Cash Flow(3) (i)
Year (a) | Total Shareholder Return (f) | Peer Total Shareholder Return (g)
2022 | $6,447,544 | n/a | $5,787,951 | n/a | $ 974,218(4) | $1,232,477(4) | $101 | $162 | $ 495 | $241
2021 | $3,823,399 | $8,942,980 | $4,153,397 | $8,930,695 | $4,004,438(5) | $4,214,026(5) | $ 99 | $116 | ($ 113) | $361
2020 | n/a | $2,773,653 | n/a | $1,110,896 | $1,092,898(6) | $ 261,907(6) | n/a | n/a | ($1,625) | $ 41
(1) The Company had two CEOs during 2021. Effective May 17th, 2021, Mr. Wood left his position of Chief Executive Officer and President of the Company and Mr. Cutt was appointed as Interim Chief Executive Officer and Chairman of the Board and assumed the role of Chief Executive Officer and Chairman of the Board on September 2, 2021. (2) TSR is determined based on the value of an initial fixed investment of $100 on December 31, 2019. The peer group TSR represents TSR of the S&P Oil & Gas Exploration & Production Index. (add to TSR and Peer TSR). (3) Adjusted Free Cash Flow is a non-GAAP measure defined as net cash provided by operating activities from the Company’s Consolidated Statement of Cash Flows less the sum of changes in operating assets and liabilities included in the operating activities section of the Consolidated Statement of Cash Flows less non-recurring general and administrative and other expenses from the Consolidated Statement of Operations less incurred capital expenditures and capitalized expenses. Adjusted Free Cash Flow was calculated assuming realized commodity pricing received throughout the year was consistent with the forward curve pricing used to set the approved Adjusted Free Cash Flow Metric in March of 2022. (4) The non-PEO NEOs during 2022 were Messrs Buese, Craine, Sluiter and Zitkus. (5) The non-PEO NEOs during 2021 were Messrs Buese, Craine, Sluiter, Robert J. Moses, Quentin Hicks and Donnie Moore. (6) The non-PEO NEOs during 2020 were Messrs Craine, Sluiter, Hicks and Moore. SEC rules require certain adjustments be made to the Summary Compensation Table totals to determine “compensation actually paid” (CAP) as reported in the Pay versus Performance Table. The following table details these adjustments:
| Executive(s) | Summary compensation table total ($) | Pension Valuation Adjustments | Equity Award Adjustments
Year | Deduct change in pension value ($) | Pension service cost adjustment ($) | Prior service cost adjustment ($) | Deduct stock awards ($) | Include year-end equity value ($) | Change in value of prior equity awards ($) | Dividends & Interest Accrued ($)
2022 | PEO1 | 6,447,544 | N/A | N/A | N/A | (4,546,228) | 3,684,198 | 202,438 | N/A
PEO2 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A
Other NEOs | 974,218 | N/A | N/A | N/A | (82,636) | 66,967 | 273,928 | N/A
2021 | PEO1 | 3,823,399 | N/A | N/A | N/A | (2,788,998) | 3,118,996 | 0 | N/A
PEO2 | 8,942,980 | N/A | N/A | N/A | 0 | 0 | (12,285) | N/A
Other NEOs | 4,004,438 | N/A | N/A | N/A | (1,735,147) | 1,949,967 | (5,233) | N/A
2020 | PEO1 | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A
PEO2 | 2,773,653 | N/A | N/A | N/A | (315,761) | 33,600 | (1,380,596) | N/A
Other NEOs | 1,092,898 | N/A | N/A | N/A | (86,361) | 9,190 | (753,819) | N/A
Named Executive Officers, Footnote [Text Block] |  | The Company had two CEOs during 2021. Effective May 17th, 2021, Mr. Wood left his position of Chief Executive Officer and President of the Company and Mr. Cutt was appointed as Interim Chief Executive Officer and Chairman of the Board and assumed the role of Chief Executive Officer and Chairman of the Board on September 2, 2021. |  |  |  |  |
Peer Group Issuers, Footnote [Text Block] |  | TSR is determined based on the value of an initial fixed investment of $100 on December 31, 2019. The peer group TSR represents TSR of the S&P Oil & Gas Exploration & Production Index. (add to TSR and Peer TSR). |  |  |  |  |
Non-PEO NEO Average Total Compensation Amount |  | $ 974,218 | [1] | $ 4,004,438 | [2] | $ 1,092,898 | [3]
Non-PEO NEO Average Compensation Actually Paid Amount |  | $ 1,232,477 | [1] | 4,214,026 | [2] | 261,907 | [3]
Compensation Actually Paid vs. Total Shareholder Return [Text Block] |  |  |  |  |  |  |
Compensation Actually Paid vs. Net Income [Text Block] |  |  |  |  |  |  |
Compensation Actually Paid vs. Company Selected Measure [Text Block] |  |  |  |  |  |  |
Tabular List [Table Text Block] |  | The Company believes that the three key financial performance measures most relevant to linking pay and performance over the long term are, in no particular order, Adjusted Free Cash Flow, Net Income and TSR. The following three tables describe the link between those metrics and “compensation actually paid” (CAP) to our CEO and other NEOs in 2022 to Company performance. |  |  |  |  |
Total Shareholder Return Amount | [4] | $ 101 |  | 99 |  |  |
Peer Group Total Shareholder Return Amount | [4] | 162 |  | 116 |  |  |
Net Income (Loss) |  | $ 495,000,000 |  | (113,000,000) |  | 1,625,000,000 |
Measure [Axis]: 1 |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Measure Name |  | Adjusted Free Cash Flow |  |  |  |  |
Measure [Axis]: 2 |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Measure Name |  | Net Income |  |  |  |  |
Measure [Axis]: 3 |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Measure Name |  | TSR |  |  |  |  |
PEO1 [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
PEO Total Compensation Amount | [5] | $ 6,447,544 |  | 3,823,399 |  |  | [4]
PEO Actually Paid Compensation Amount |  | 5,787,951 |  | 4,153,397 |  |  |
PEO1 [Member] | Deduct change in pension value [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  |  |  |  |
PEO1 [Member] | Pension service cost adjustment [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  |  |  |  |
PEO1 [Member] | Prior service cost adjustment [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  |  |  |  |
PEO1 [Member] | Deduct stock awards [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  | (4,546,228) |  | (2,788,998) |  |  |
PEO1 [Member] | Include year-end equity value [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  | 3,684,198 |  | 3,118,996 |  |  |
PEO1 [Member] | Change in value of prior equity awards [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  | 202,438 |  | 0 |  |  |
PEO1 [Member] | Dividends & Interest Accrued [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  |  |  |  |
PEO2 [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
PEO Total Compensation Amount | [5] |  |  | 8,942,980 |  | 2,773,653 |
PEO Actually Paid Compensation Amount |  |  |  | 8,930,695 |  | 1,110,896 |
PEO2 [Member] | Deduct change in pension value [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  |  |  |  |
PEO2 [Member] | Pension service cost adjustment [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  |  |  |  |
PEO2 [Member] | Prior service cost adjustment [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  |  |  |  |
PEO2 [Member] | Deduct stock awards [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  | 0 |  | (315,761) |
PEO2 [Member] | Include year-end equity value [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  | 0 |  | 33,600 |
PEO2 [Member] | Change in value of prior equity awards [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  | (12,285) |  | (1,380,596) |
PEO2 [Member] | Dividends & Interest Accrued [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  |  |  |  |
Adjusted Free Cash Flow [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Company Selected Measure Amount | [6] | 241 |  | 361 |  | 41 |
Other NEOs [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
PEO Total Compensation Amount |  | $ 974,218 |  | $ 4,004,438 |  | $ 1,092,898 |
Other NEOs [Member] | Deduct change in pension value [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  |  |  |  |
Other NEOs [Member] | Pension service cost adjustment [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  |  |  |  |
Other NEOs [Member] | Prior service cost adjustment [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  |  |  |  |
Other NEOs [Member] | Deduct stock awards [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  | (82,636) |  | (1,735,147) |  | (86,361) |
Other NEOs [Member] | Include year-end equity value [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  | 66,967 |  | 1,949,967 |  | 9,190 |
Other NEOs [Member] | Change in value of prior equity awards [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  | 273,928 |  | (5,233) |  | (753,819) |
Other NEOs [Member] | Dividends & Interest Accrued [Member] |  |  |  |  |  |  |
Pay vs Performance Disclosure [Table] |  |  |  |  |  |  |
Adjustment to Compensation Amount |  |  |  |  |  |  |
[1] | The non-PEO NEOs during 2022 were Messrs Buese, Craine, Sluiter and Zitkus.
[2] | The non-PEO NEOs during 2021 were Messrs Buese, Craine, Sluiter, Robert J. Moses, Quentin Hicks and Donnie Moore.
[3] | The non-PEO NEOs during 2020 were Messrs Craine, Sluiter, Hicks and Moore.
[4] | TSR is determined based on the value of an initial fixed investment of $100 on December 31, 2019. The peer group TSR represents TSR of the S&P Oil & Gas Exploration & Production Index. (add to TSR and Peer TSR).
[5] | The Company had two CEOs during 2021. Effective May 17th, 2021, Mr. Wood left his position of Chief Executive Officer and President of the Company and Mr. Cutt was appointed as Interim Chief Executive Officer and Chairman of the Board and assumed the role of Chief Executive Officer and Chairman of the Board on September 2, 2021.
[6] | Adjusted Free Cash Flow is a non-GAAP measure defined as net cash provided by operating activities from the Company’s Consolidated Statement of Cash Flows less the sum of changes in operating assets and liabilities included in the operating activities section of the Consolidated Statement of Cash Flows less non-recurring general and administrative and other expenses from the Consolidated Statement of Operations less incurred capital expenditures and capitalized expenses. Adjusted Free Cash Flow was calculated assuming realized commodity pricing received throughout the year was consistent with the forward curve pricing used to set the approved Adjusted Free Cash Flow Metric in March of 2022.

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_AdjToCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_CoSelectedMeasureAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph iii + Details
Name: | ecd_CompActuallyPaidVsCoSelectedMeasureTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph ii + Details
Name: | ecd_CompActuallyPaidVsNetIncomeTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 5 -Subparagraph i + Details
Name: | ecd_CompActuallyPaidVsTotalShareholderRtnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph vi + Details
Name: | ecd_MeasureName
Namespace Prefix: | ecd_
Data Type: | xbrli:normalizedStringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 3 + Details
Name: | ecd_NamedExecutiveOfficersFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_NonPeoNeoAvgCompActuallyPaidAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_NonPeoNeoAvgTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_PeerGroupIssuersFnTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_PeerGroupTotalShareholderRtnAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iii + Details
Name: | ecd_PeoActuallyPaidCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph ii + Details
Name: | ecd_PeoTotalCompAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 1 + Details
Name: | ecd_PvpTable
Namespace Prefix: | ecd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 1 + Details
Name: | ecd_PvpTableTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 6 + Details
Name: | ecd_TabularListTableTextBlock
Namespace Prefix: | ecd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K -Number 229 -Section 402 -Subsection v -Paragraph 2 -Subparagraph iv + Details
Name: | ecd_TotalShareholderRtnAmt
Namespace Prefix: | ecd_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(22)) -URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22595-107794 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(18)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 40 -Section 65 -Paragraph 1 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=126732423&loc=SL123482106-238011 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=124431353&loc=SL124452729-227067 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(20)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22499-107794 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iii)(A)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22663-107794 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 17: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(ii)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22583-107794 Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126958026&loc=SL5780133-109256 Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22658-107794 Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669619-108580 Reference 25: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8924-108599 Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 11 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794 Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 11 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124431687&loc=d3e22694-107794 Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760 Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669625-108580 Reference 30: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 31: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 32: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(B)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 33: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iii)(A)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 34: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599 Reference 35: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 + Details
Name: | us-gaap_NetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ecd_MeasureAxis=1
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=2
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_MeasureAxis=3
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_IndividualAxis=gpor_PEO1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=gpor_DeductChangeInPensionValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=gpor_PensionServiceCostAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=gpor_PriorServiceCostAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=gpor_DeductStockAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=gpor_IncludeYearendEquityValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=gpor_ChangeInValueOfPriorEquityAwardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_AdjToCompAxis=gpor_DividendsInterestAccruedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_IndividualAxis=gpor_PEO2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_IndividualAxis=gpor_AdjustedFreeCashFlowMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ecd_IndividualAxis=gpor_OtherNEOsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |